Big Joe PDBB-20-T12 Operation, Maintenance, Repair Parts List page 69

10-3.4.Test the Fault Detection Circuitry
1. Put the vehicle up on blocks to get the drive wheel
off the ground.
2. Disconnect the battery and make sure the key-
switch is off.
3. Using an inline fuse holder fitted with a 10 amp
fuse and alligator clips, connect the controller's M-
and B- terminals.
4. Turn the keyswitch on, release the brake and
apply the throttle. The motor should not operate,
and the direction contactors should not pull in.
5. Leave the keyswitch on and remove the inline
fuse wire. The vehicle status should continue to
remain off.
6. Cycle the keyswitch off and on, release the brake,
and apply the throttle. The vehicle should now
operate normally.
10-3.5.Panel Removal
1. Disconnect the battery.
2. Remove the motor compartment cover.
3. Refer to Figure 10-5
electrical wires and cables from the transistor
control electrical contactor panel.
4. Remove four screws (29,
lock washers (28) to release and remove the elec-
trical panel.
10-3.6.Panel Disassembly and Reassembly
1. Refer to Figure 10-5
the electrical panel and remove defective compo-
nents as required.
2. Be sure to make note of the location of bussbars
(7 and 8), when removing contactors, to facilitate
reassembly.
3. Upon reassembly of the electrical panel, inspect
each connection to ensure that a good positive
contact is made at all wire and cable connections.
10-3.7.Panel Installation
Install the electrical panel assembly in reverse of
instructions for removal.
10-4.PUMP MOTOR.
Refer to applicable Figure 11-20
bly. The pump is replaceable but not repairable. When
replacing pump be sure to install the gasket between
pump and motor.
901357
and tag and disconnect all
Figure 10-6) and four
for identity of components of
for motor disassem-
10-5.DRIVE MOTOR.
Refer to Figure 11-19 for motor disassembly.
10-6.BATTERY CHARGER.
Refer to Figure 11-24 thru
bly and part number information.
NOTE: Refer to paragraph
battery charger.
10-7.TRAVEL LIMIT SWITCH.
10-7.1. Serial Number 375067 to 377143
1. Disconnect wiring from travel limit switch (13,
ure 10-6), then remove nuts (12), lockwashers
(11), and washers (10) securing switch mounting
bracket (9) to frame.
2. Remove travel limit switch from bracket, and
install new switch onto bracket.
NOTE: Bracket must be positioned so that switch is
operated when platform is down.
3. Position new switch (13) on bracket (9), and
secure with washers (10), lockwashers (11), and
nuts (12).
4. Reconnect wiring to switch.
10-7.2. Serial Number 377144 and Higher
1. Disconnect wiring from travel limit switch (13,
ure 10-6), then remove screws (12), lockwashers
(11), and washers (10) securing switch mounting
bracket (9) to frame.
2. Remove travel limit switch from bracket, and
install new switch onto bracket.
NOTE: Bracket must be positioned so that switch is
operated when platform is down.
3. Position new switch (13) on bracket (9), and
secure with washers (10), lockwashers (11), and
screws (12).
4. Reconnect wiring to switch.
10-8.HORN.
1. Disconnect wiring and suppressor (37,
6) from horn (35), then remove nut (41), lock-
washer (40) and washer (39) securing horn.
2. Remove horn.
3. Position new horn in place, reinstall nut, lock-
washer and flat washer, then reconnect wiring
and suppressor (37).
Figure 11-28 for disassem-
4-2. for troubleshooting of
Fig-
Fig-
Figure 10-
10-5